<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
#internal { background: url("green.bmp"); }
#internal::after { content: "內部"; }
</style>
</head>
<body>
<blockquote id="internal"></blockquote>
<blockquote><img src="red.bmp"></blockquote>
</body>
</html>
